Browse Kotlin Multiplatform libraries

Scaffolding for full-stack apps: integrated shared business logic, declarative UI, server backend, Web/Wasm support, and organized common plus platform-specific source sets for reuse.

Convenient extensions and utilities for dates, times and timestamps: now getters, converters, arithmetic, queries, rounding, parsing, formatting, duration calculations and start/end-of-day helpers.

Parse and compare semantic-style version strings with optional prefixes, pre-release and build metadata; treats empty subparts as zero, ignores prefixes/build metadata for ordering, supports numeric/alphanumeric ordering.

BDD extensions for Kotest enabling expressive Given/When/Then and Expect tests, type-safe DSL, built-in data-driven row() parameterization, and concise And chaining.

Simplifies app development by providing default networking, storage, dependency injection, plugin system, material icons and monospaced font, logging and SQL storage, plus Chinese-text rendering fixes.

Customizable interactive line charts with marker popups, multiple data-series and point support, consistent styling across builds, smooth rendering, and a sample app (including a WASM demo).

Rendering customizable calendars, pagers and date pickers with single/multi/range selection, ranged highlighting, flexible appearance configuration, paged navigation, and optional global defaults — experimental.

Type-safe, fluent validation DSL for expressive, composable rules with zero-reflection performance, modular extensibility, detailed error reporting, fail-fast or collect-all modes, and optional datetime validators.

Offering asynchronous, feature-rich access to OpenAI's API for chat, images, embeddings, files, fine‑tuning, moderation and audio, plus ProGuard rules, sample apps and guides.

Clear, faithful QR Code generator implementing the original algorithm; emphasizes readability, correctness and easy integration to produce standard-compliant QR Codes for projects.

Embeds QuickJS to download and run JavaScript modules inside host apps, enabling hot-deployable, interface-bridged services with precompiled bytecode, modular caching, source-mapped debugging, and signature verification.

Lightweight observable state container enabling atomic compare-and-set updates, snapshotting, change listeners, and asynchronous notifications for predictable, thread-safe state management and easy integration.

Lightweight, zero-dependency parser converting JSX into a type-safe AST with a simple parse API, returning success/failure results and readable errors.

Opinionated Compose UI utility collection featuring a compact Autocomplete component with state helpers, simple suggestion filtering, and reusable, highly-specialized components for rapid integration.

High-level client for Mattermost API enabling bots/integrations to receive direct messages, detect chats, handle attachments, send messages, and split large Markdown responses.

Mocking via code-generation with concise, non-intrusive, type-safe API; mocks classes and interfaces, supports value/matcher stubbing, function/coroutine stubs, implicit Unit stubbing, verification.

Zero-dependency parser and serializer for SPAYD (Short Payment Descriptor) QR-payment strings — read, write, encode/decode with single-file, copyable implementation and serialization support.

Comprehensive error-handling toolkit offering rich, actionable exceptions with UI metadata, centralized internationalized error catalog, and composable UI components for consistent, severity-aware error presentation.

Compose-based cross-platform app template enabling shared UI and platform-specific code separation, offering native entry points, SwiftUI support, and Wasm/JS development/run tasks.

Real-time collaborative engine leveraging Server-Sent Events to manage room-based sessions, broadcast events, handle keep-alives, and coordinate structured asynchronous processing for interactive applications.

Lightweight, customizable form-builder DSL with reusable fields, built-in field and form validation, stateful ViewModel access, change observation, and custom input field support.

Lightweight JSON query language enabling non-developers to run expressive, JMESPath-like queries with filters, wildcards, type and string checks, selections, and type-safe extraction.

SwiftUI-like declarative UI toolkit for building composable components using prefix operators (!,+,-), chainable modifiers, state bindings, and common view primitives (VStack, Text, Slider).

Parses ANSI escape sequences into ratatui-styled text, converting terminal color/style codes (4-, 8-, 24-bit colors; bold, italic, underline, reset) for TUI rendering.

Terminal styling toolkit: style definitions, git/LS_COLORS parsers, ANSI escape parsing, converters to ROFF/SVG, backend adapters and color utilities for colored terminal output.

Cook up interactive terminal user interfaces using a flexible widget-based toolkit with layout system, ready-made templates, extensive examples, documentation, and community resources for building text-based apps.

Cassowary constraint-solving implementation for UI layout, low-level solver API with weighted strengths, editable variables for interactive updates, and dual error styles (exceptions or Result-based).

Generate ROFF man pages programmatically using an abstract document model, inline styles, control directives, text-formatting helpers, and safe rendering with apostrophe handling.

Save and restore serializable objects to disk with asynchronous IO, in-memory caching, FIFO read–write locks, default values, migration helpers and observable updates via flows.